diff --git a/doc/go_spec.html b/doc/go_spec.html
index e9f6476a89..13dae09420 100644
--- a/doc/go_spec.html
+++ b/doc/go_spec.html
@@ -1,6 +1,6 @@
 <!--{
 	"Title": "The Go Programming Language Specification",
-	"Subtitle": "Version of April 21, 2016",
+	"Subtitle": "Version of April 25, 2016",
 	"Path": "/ref/spec"
 }-->
 
@@ -1043,8 +1043,8 @@ promoted methods are included in the method set of the struct as follows:
 <p>
 A field declaration may be followed by an optional string literal <i>tag</i>,
 which becomes an attribute for all the fields in the corresponding
-field declaration. The tags are made
-visible through a <a href="/pkg/reflect/#StructTag">reflection interface</a>
+field declaration. An empty tag string is equivalent to an absent tag.
+The tags are made visible through a <a href="/pkg/reflect/#StructTag">reflection interface</a>
 and take part in <a href="#Type_identity">type identity</a> for structs
 but are otherwise ignored.
 </p>